fly block
Americannoun
Machinery, Nautical.
-
(in a Spanish burton or the like) a block, supported by a runner, through which the hauling part of the fall is rove.
-
any block that shifts with the movement of its tackle.
Etymology
Origin of fly block
First recorded in 1835–45
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Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
